Materials and Structural Performance in Fire

The residual mechanical properties of two families of special concretes (self-compacting limestone concrete -SCC and shotcrete) exposed to high temperature are investigated in the first part of this chapter, since the spe-cific properties of these concretes may in principle affect their mechanical behavior at high temperature, more than in ordinary vibrated concrete. The results show that this is not the case, but in shotcrete the type of the accelerating agent may severely affect concrete strength in virgin conditions, with major consequences on the strength at high temperature. In the second part of the chapter, new information is provided on the residual properties of the reinforcement (carbon-steel bars, tempcore bars and stainless-steel bars), as well as some results concerning the residual be-havior of steel and polymeric fibers, and bar-concrete bond. In the third part, some aspects of the structural behavior under fire are considered, with reference to R/C sec-tions and columns, and a case history concerning a parking lot in fire ends the chapter.